Cylinder for internal-combustion engines



May 10, 1927. HBECKER CYLINDER Eon INTERNAL coNEUs'rIoN ENGINES FiledNay 18. 1926 MMA, JM if /44 Patented May l0, 1927.

UNITED STATES if PATENT oFFlcE( HEINRICH BECKER, OF KIEL-HASSEE,GERMANY, ASSIGNOR TO FRIED. KRU'PP GER- MANIAWERFT AKTIENGESELLSCHAFT,OF KIEL-GAARDEN, GERMANY.

CYLINDER FOR INTERNAL-COMBUSTION ENGINES.

Application led Hay 18, 1926, Serial No. 110,004, and in Germany June20, 1925.

The invention relates to double-acting twostroke internal combustionengines having scavenging ports, and has in particular ref-` erence to acylinder arrangement for engines of this type, in which the inlet andoutlet passages are for the scavenging air lodged in a supporting pieceresing on the frame of the engine and transmitting the forces.

A preferred embodiment of the subjectmatter of my invention isillustrated by way of example in the drawing which accompanies and formspart of this specification, the parts in consideration of the enginebeing shown in vertical section.

The working cylinder of the engine is lodged ,in a supporting piece Awhich rests upon standards B and has arranged in it, in a manner knownper se, the passages a1, a which serve to admit and lead oi thescavenging air. The cylinder proper is substantially composed of threeparts, viz a middle piece C, partly double-walled, two liners D ofanalogous construction and two cooling jackets E, likewise of analogousconstruction. The outer wall c1 of the middle piece C-is centered in thesupporting piece A and is carried by the latter through the intermediaryof a flange o provided on its upper end. The

lower end `of Wall c1 is able to freely expand in longitudinal directionwithin the lower end of the'supporting piece A. The inner wall c of themiddle piece C extends but for a small distance on both sides beyond theinlet and outlet ports 04,05 provided therein, its extremities have anenlarged inner diameter so as to receive the liners D which are centeredon these places relatively to the middle piece C. The portions of theliners D extending beyond the supporting piece A .40 are surrounded bytubularcooling jackets E,

the inner ends of which abut against the supporting piece A. said flangec3 transmitting on the upper sido the pressure of this abutment.

The whole three-part vworking, cylinder is held together by the pressureof the vcover screw bolts F, the inner endsof which are screwed into thesupporting piece A. The pressure exerted by the covers G is transmittedonboth sides over the anges d1 of the liners D and the jackets E ontothe supporting piece A, this transmission taking place on the upper sideby the intermediary of flange c". The innerends, however, turned to oneanother, of the liners D are vable to freely expand in longitudinaldirection with relation to the inner wall c2 of the middle piece C.

As it will clearly be seen, the described ar rangement first results ina very simple and clear structure and an extremely simple shape of theindividual elements of the cylin-Y der, this feature being of particularim ortance with engines of great power in w ich the describedarrangement is destined to be used in the first place. Especially thecool- I Another important progress is obtained by v the describedcylinder in so far as the parts C, D, which are most exposed to thenoxious action of the hot gases, are able to freely expand, namely theliners D withinthe middle piece C and this latter within the supportingpiece A.

Instead of being screwed into the supporting iece -A, the bolts lF maybe united so as to orm tie-rods extending from cover to cover. y

Claim:

In a vertical double-acting two-stroke internal combustion engine: acylinder, a piece supporting the cylinder, scavenging passages lodged insaid supporting piece, said cylinder comprising-a double-walled middlepiece having ports for scavenging air corresponding to said passages ofthe supporting piece, the outer wall of said middle piece correspondingin length to said supporting piece, a flange connection between theupper ends of said supporting piece and said middle piece, two jacketsforming a prolongation each vof the outer wall of said middle piece,

two liners forming rolongations of the inner Walls of said midJdlepiece, flange connections between the outer ends of said jackets andsaid liners, connections between the inner ends of said liners and theinner wall of said middle piece adapted to permit free expansion of saidliners with relation to .said

mensen middle piece, covers abutting against the The foregoingspecification signed :it Hamburg, Germany, this twenty-seventh day ofApril, 1926.

HEINRICH BECKER.

